展开和折叠所有树项目。
如何在编辑器中展开和折叠代码节以增强可见性。
How to expand and collapse sections of code to increase visibility in the editor.
单击别名前的图标可展开和折叠与该数据库相关联的信息。
Clicking the icon next to the alias name expands and contracts the information associated with the database.
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